Inexpensive jig can steadily guide drill at selected angles to flat plane from any direction. Jig uses two mutually perpendicular bevel bodies, each corresponding to interval settings. Drill block has spline on one side to engage groove on bevel body at selected angle. Angles are set by loosening wing nuts, tilting drill block to desired angle until spline engages groove, and tightening nuts

Stringer, E. J.

English

NASA Technical Reports Server

S 
October 1973	 B73-10324 
• 
NASA TECH BRIEF 
Marshall Space Flight Center
	 W 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage 
commercial application. Tech Briefs are available on a subscription basis from the National Technical Information 
Service, Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Office, NASA, Code KT, Washington, D.C. 20546. 
Universal Drill Jig 
.
	
Universal Drill Jig
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This document was prepared under the sponsorship of the National 	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States 	 will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19730000324 2020-03-17T06:57:43+00:00Z
The problem: 
Drilling of holes at different angles to the flat plane 
often requires expensive tools such as a radial arm drill 
press. 
The solution: 
An inexpensive jig can steadily guide the drill at se-
lected angles to the flat plane from any direction. 
How it's done: 
The jig shown in the figure uses two mutually perpen-
dicular bevel bodies designed to set the drill bit at 15 
intervals from 900 to 450 to the flat plane. Each bevel 
body has grooves to correspond to 150 interval settings. 
A drill block used for guiding the drill bit has a spline on 
one side to engage the groove on the bevel body at a 
selected angle. Angles are set by loosening wing nuts on 
either or both bodies, tilting the drill block to the de-
sired angle until the spline engages the groove, and tight-
ening the nuts. The drill bit is then inserted through the 
drill block and guided at the selected angle. 
To hold the entire assembly steady, several types of 
clamp bracket mounts are available for supporting the 
bevel bodies (see figure). In addition, another type of 
drill block may be used, to guide the different sizes of 
drill bits, by simply selecting a proper hole on the drill-
selector drum.
Notes: 
1. The jig can be designed for angle settings other than 
those described. 
2. Requests for further information may be directed to: 
Technology Utilization Officer 
Marshall Space Flight Center 
Code A&PS-TU 
Marshall Space Flight Center, Alabama 35812 
Reference: B73.10324 
Patent status: 
Inquiries concerning rights for the commercial use of 
this invention should be addressed to: 
Patent Counsel 
Marshall Space Flight Center 
Code A&PS-PAT 
Marshall Space Flight Center, Alabama 35812 
Source: E. J. Stringer of 
Rockwell International Corp. 
under contract to
Marshall Space Flight Center 
(MFS-24464) 
B73 . 10324	 Category 07


Universal drill jig

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